Characterization of waste foundry sand (WFS) and use for production of concrete blocks

Reference	Presenter	Authors (Institution)	Abstract
04-061	Renata da Silva Magalhães	Magalhães, R.d.(Universidade Estadual Paulista); Santos, L.F.(Universidade Estadual Paulista); Santos, G.T.(Universidade Estadual Paulista); Leme, T.S.(Universidade Estadual Paulista); Souza, A.E.(Universidade Estadual Paulista); Teixeira, S.R.(Universidade Estadual Paulista);	The waste foundry sand (WFS) is considered the industrial solid waste generated in large quantities by the foundry industries. The WFS has a high concentration of SiO2 (> 80% p) and other elements in lower concentration, such as oxides, aluminum, iron, magnesium, sodium and potassium. This work has as objective the study of sustainable alternative to the use of waste foundry sand (WFS) in the making of concrete paving blocks. In this sense, your mineralogical composition was investigated by x-ray diffraction (XRD), thermal decomposition on thermogravimetric (TG) and differential scanning calorimetry (DSC) and morphology by scanning electron microscopy (SEM). To sort and evaluate the behavior, in environmental terms, leaching tests were carried out (ABNT-NBR 1005/87) and solubilization (ABNT-NBR 1006/87), of the WFS. Were prepared specimens of concrete, with replacement (10 to 100%) of the sand fraction by WFS, in order to find the ideal trait for these materials. The specimens were tested for water absorption and resistance to compression
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